| 摘要 |
PROBLEM TO BE SOLVED: To shorten the date schedules for design and installation and to reduce a cost by automating the management of an electrode tip from the position correction of this tip based on wear. SOLUTION: The position A of the moving side electrode tip 36 is stored by executing idle stroke with a reference electrode tip at the time of teaching. An approach position C where the moving side electrode tip 36 may be pressed to a reference stationary object 21 is taught in a robot by moving this robot. The moving side electrode tip 36 is pressed to the reference stationary object 21 and the difference from the position D of the tip 36 is stored. Next, the previously taught idle stroke is reproduced and the differenceδbetween the position B of the electrode tip 36 and the position A at the time of the teaching is calculated. This differenceδis the first total abrasion loss. The contact with the reference stationary object 21 is likewise reproduced and the differenceβbetween the approach position C' and the position D of the electrode tip 36 is detected. As a result,δ: the first total abrasion loss, i.e., the first moving side correction rate,α: a reference stroke length,β: the stroke length at the time of the first wear,γ=β-α: the first moving side abrasion loss,ε=δ-(β-α): the first stationary side correction rate are attained.
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